If there's one issue we have with the Acura RLX, it's that it's not a particularly exciting car. It's a solid luxury sedan, but its standard V6 engine - complete with 310 horsepower and 272 pound-feet of torque - is lacking when you can snap up a BMW 5 Series with a 4.4-liter, twin-turbocharged V8. The RLX Sport Hybrid SH-AWD should address this complaint.